1 /* 2 ******************************************************************************* 3 * 4 * Copyright (C) 1999-2015, International Business Machines 5 * Corporation and others. All Rights Reserved. 6 * 7 ******************************************************************************* 8 * file name: SimpleFontInstance.cpp 9 * 10 * created on: 03/30/2006 11 * created by: Eric R. Mader 12 */ 13 14 #include "unicode/utypes.h" 15 #include "unicode/uchar.h" 16 17 #include "layout/LETypes.h" 18 #include "layout/LEFontInstance.h" 19 20 #ifndef USING_ICULEHB 21 #include "CanonShaping.h" 22 #endif 23 24 #include "SimpleFontInstance.h" 25 26 SimpleFontInstance::SimpleFontInstance(float pointSize, LEErrorCode &status) 27 : fPointSize(pointSize), fAscent(0), fDescent(0) 28 { 29 if (LE_FAILURE(status)) { 30 return; 31 } 32 33 fAscent = (le_int32) yUnitsToPoints(2000.0); 34 fDescent = (le_int32) yUnitsToPoints(600.0); 35 36 return; 37 } 38 39 SimpleFontInstance::~SimpleFontInstance() 40 { 41 // nothing to do... 42 } 43 44 const void *SimpleFontInstance::getFontTable(LETag tableTag, size_t &length) const 45 { 46 length = -1; // unknown for this test. 47 #ifndef USING_ICULEHB 48 if (tableTag == LE_GSUB_TABLE_TAG) { 49 return CanonShaping::glyphSubstitutionTable; 50 } 51 52 if (tableTag == LE_GDEF_TABLE_TAG) { 53 return CanonShaping::glyphDefinitionTable; 54 } 55 #endif 56 return NULL; 57 } 58 59 void SimpleFontInstance::getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const 60 { 61 #if 0 62 if (u_getCombiningClass((UChar32) glyph) == 0) { 63 advance.fX = xUnitsToPoints(2048); 64 } else { 65 advance.fX = 0; 66 } 67 #else 68 (void)glyph; // Suppress unused parameter compiler warning. 69 advance.fX = xUnitsToPoints(2048); 70 #endif 71 72 advance.fY = 0; 73 } 74 75 le_int32 SimpleFontInstance::getUnitsPerEM() const 76 { 77 return 2048; 78 } 79 80 le_int32 SimpleFontInstance::getAscent() const 81 { 82 return fAscent; 83 } 84 85 le_int32 SimpleFontInstance::getDescent() const 86 { 87 return fDescent; 88 } 89 90 le_int32 SimpleFontInstance::getLeading() const 91 { 92 return 0; 93 } 94 95 // We really want to inherit this method from the superclass, but some compilers 96 // issue a warning if we don't implement it... 97 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const 98 { 99 return LEFontInstance::mapCharToGlyph(ch, mapper, filterZeroWidth); 100 } 101 102 // We really want to inherit this method from the superclass, but some compilers 103 // issue a warning if we don't implement it... 104 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const 105 { 106 return LEFontInstance::mapCharToGlyph(ch, mapper); 107 } 108 109 LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch) const 110 { 111 return (LEGlyphID) ch; 112 } 113 114 float SimpleFontInstance::getXPixelsPerEm() const 115 { 116 return fPointSize; 117 } 118 119 float SimpleFontInstance::getYPixelsPerEm() const 120 { 121 return fPointSize; 122 } 123 124 float SimpleFontInstance::getScaleFactorX() const 125 { 126 return 1.0; 127 } 128 129 float SimpleFontInstance::getScaleFactorY() const 130 { 131 return 1.0; 132 } 133 134 le_bool SimpleFontInstance::getGlyphPoint(LEGlyphID /*glyph*/, le_int32 /*pointNumber*/, LEPoint &/*point*/) const 135 { 136 return FALSE; 137 } 138 139
